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Macro shot of 316 stainless steel bolt head marking A4-70, illustrating ISO 3506 corrosion resistant standards.
02 Dec
Technical Data and References

Technical Data Sheet: 316 Stainless Steel (UNS S31600 / 1.4401)

  • January 14, 2026
  • By author-avatar Oliva Zhang

Specs for 316 Stainless (S31600/A4). Details Molybdenum content for marine use, ISO 3506 A4-70 mechanical properties, and chloride corrosion resistance.

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Photos of 304 stainless steel screws and nuts (A2-70)
02 Dec
Technical Data and References

Technical Data Sheet: 304 Stainless Steel (UNS S30400 / 1.4301)

  • December 2, 2025
  • By author-avatar Oliva Zhang

Technical data for 304 Stainless (S30400). Details ASTM A240 specs, ISO 3506 A2-70 mechanical limits, chemical composition, and magnetic permeability.

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Close up of water resistant A4 316 marine grade stainless steel bolt preventing rust.
28 Nov
Fastener Materials

The A2 vs A4 Stainless Steel Bolt Guide for Engineers & Buyers

  • January 14, 2026
  • By author-avatar Oliva Zhang
In the world of industrial fasteners, the choice between A2 and A4 stainless steel is one of the most commonโ€”and criticalโ€”decision...

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